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Finding the Fourth Proportional to 688,672.80, 950,096.34 and 398,230.92

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Solution

The fourth proportional to 688,672.80, 950,096.34 and 398,230.92 is: 549,401.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,672.80 : 950,096.34 = 398,230.92 : x
  2. Step 2: Convert to fraction form
    688,672.80/950,096.34 = 398,230.92/x
  3. Step 3: Cross multiply
    688,672.80x = 950,096.34 × 398,230.92
  4. Step 4: Simplify right side
    688,672.80x = 378,357,739,566.83
  5. Step 5: Solve for x
    x = 378,357,739,566.83/688,672.80
  6. Step 6: Final answer
    x = 549,401.31

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.